If you have joined to test 2.1, you can continue testing by updating your 2.1. If you want to upgrade from 2.0.x, read its explanation. Remember that you should back up your site before you start updating.

In the case of upgrading from some other versions, you must patch your mainfile.php according to the methods written in wiki documents. But, if you use XOOPS Protector, you have to adjust your mainfile.php as follow: